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1200600/1000j800///钢管11001400dn300900///螺旋/700.//500400
/钢管dn300900/1000//6001100/700//800500//螺旋12001400/400
1000//1200dn300900/螺旋/1100钢管//5008001400/700///400600
/1000钢管/12001100螺旋500700/600dn300900//1400/800//400//
700 400 节1000dn300900伸缩304 补偿器不锈钢 800膨胀500600
